1 Features
1• Offered in High-Grade (ISO224B) and Low-Grade
(ISO224A) Versions
• ±12-V Input Voltage Range Optimized for Isolated
Voltage Measurement in Industrial Applications
• Overvoltage Input Clamp With 9-kV ESD
• ±4-V Differential Output Voltage Range With
Common-Mode at VDD2 / 2
• Low DC-Error Operation (ISO224B):
– Input Offset: ±5 mV at 25°C, ±15 μV/°C max
– Gain Error: ±0.3% at 25°C, ±35 ppm/°C max
– Nonlinearity: ±0.01% max, ±0.1 ppm/°C typ
• 4.5-V to 18-V Single-Supply on High-Side
• 4.5-V to 5.5-V Operation on Low-Side
• Safety-Related Certifications:
– 7071-VPEAK Reinforced Isolation per DIN VDE
V 0884-11: 2017-01
– 5000-VRMS Isolation for 1 Minute per UL1577
• High CMTI (ISO224B): 80 kV/μs (typ)

2 Applications
• Isolated Analog Signal Acquisition in:
– Grid Automation
– Protection Relays
– Factory Automation and Control
– Rail Transport
– Motor Drives
– Power Analyzers

3 Description
The ISO224 is a precision isolated amplifier with an
output separated from the input circuitry by an
isolation barrier with high immunity to magnetic
interference. This barrier is certified to provide
reinforced galvanic isolation of up to 5 kVRMS with an
exceptionally long lifetime and low power dissipation.
When used with isolated power supplies, this device
separates parts of the system that operate on
different common-mode voltage levels and protects
lower-voltage devices from damage.
The input of the ISO224 is optimized for accurate
sensing of ±10-V signals that are widely used in
industrial applications. The device operates of a
single supply on the high-side. This unique feature
simplifies the design of the isolated power supply and
reduces the system cost. The integrated high-side
supply voltage detection feature simplifies system
level diagnostics. The ±4-V output of the ISO224
allows lower-cost analog-to-digital converters (ADCs)
to be used. The differential structure of the output
supports high immunity to noise.
The ISO224 is fully specified over the extended
industrial temperature range of –55°C to +125°C and
is available in a wide-body 8-pin SOIC (DWV)
package.